Summary
Two co-occurring high altitude calanoid copepods, Diaptomus shoshone Marsh and D. coloradensis Forbes are of different size: the former is approximately twice as long as the latter. There are also temporal differences in development: the former matures 2–3 weeks before the latter in most ponds. Gut analyses of copepodids and adults of both species indicate that D. shoshone eats larger food particles but that D. shoshone early copepodids eat particles similar in size to D. coloradensis adults. Morphology of feeding appendages partially explains the dietary differences. These data are discussed from the viewpoint of competition between the species; it is concluded that either temporal differences or size differences of copepodids and adults would allow coexistence and that extreme size differences are probably unimportant compared to morphological differences of feeding appendages and perhaps behavioral differences.
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References
Anderson, R. S.: Diaptomid copepods from two mountain ponds in Alberta. Can. Journal Zool. 45, 1043–1047 (1967)
Anderson, R. S.: Predator-prey relationships and predation rates for crustacean zooplankters from some lakes in western Canada. Can. Journal Zool. 48, 1229–1240 (1970)
Anraku, M., Omori, M.: Preliminary survey of the relationships between the feeding habit and the structure of mouthparts of marine copepods. Limnol. Oceanogr. 8, 116–126 (1963)
Cole, G. A.: Some calanoid copepods from Arizona with notes on congeneric occurrences of Diaptomus species Limnol. Oceanogr. 6, 432–442 (1961)
Dodson, S. I.: Complementary feeding niches sustained by size-selective predation. Limnol. Oceanogr. 15, 131–137 (1970)
Fryer, G.: Contributions to our knowledge of the biology and systematics of the freshwater Copepoda. Schweiz. Z. Hydrol. 16, 64–77 (1954)
Hammer, V. T., Sawchyn, W. W.: Seasonal succession and congeneric associations of Diaptomus spp. in Saskatchewan ponds. Limnol. Oceanogr. 13, 476–484 (1968)
Hutchinson, G. E.: Homage to Santa Rosalia or why are there so many kinds of animals? Amer. Nat. 93, 145–159 (1959)
Hutchinson, G. E.: A treatise on limnology, vol. 2, 1115 pp. New York: Wiley 1967
Ivlev, V. S.: Experimental ecology of the feeding of fishes, 302 pp. New Haven: Yale University Press 1961
Lack, D.: The natural regulation of animal numbers, 343 pp. Oxford: Clarendon Press 1954
Lowndes, A. G.: The swimming and feeding of certain calanoid copepods. Proc. Zool. Soc. London 3, 687–715 (1935)
McQueen, D. J.: Grazing rates and food selection in Diaptomus oregonensis (Copepoda) from Marion Lake, British Columbia. J. Fish. Res. Bd. Canada 27, 13–20 (1970)
Sandercock, G. A.: A study of selected mechanisms for coexistence of Diaptomus species in Clarke Lake, Ontario. Limnol. Oceanogr. 12, 97–112 (1967)
Smith, G. M.: The fresh-water algae of the United States, 719 pp. New York: McGraw-Hill 1950
Sprules, W. G.: Effects of size-selective predation and food competition on high altitude zooplankton communities. Ecology 53, 375–386 (1972)
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Supported in part by a Tufts Faculty Research Award.
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Maly, E.J., Maly, M.P. Dietary differences between two co-occurring calanoid copepod species. Oecologia 17, 325–333 (1974). https://doi.org/10.1007/BF00345750
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DOI: https://doi.org/10.1007/BF00345750